Transmission mechanism



Nov. 13,1923. y 1,474,279

J. E. MINNER' TRANSMISSION MECHANISM Filed June 23.. 1922 2 sheets-sheet 1 (W. (VW. 'BY @VENYTOR ATTORNEY change of speed may Patented Nov. 13, 1923.

Unire s'r'rns JULIAN E. MINNER, F MANDAN, NORTH DAKOTA.

TBAHSMSSON MEGHANISM.

Application'led .Tune 23,

To all 107mm il rmay concern.'

Bc it known that l, Junren E. M1NNeR,'a citizen of the United States, residing at Mandar.. in the county of Morton and State of North Dakota, have invented new and useful improvements in Transmission Mechanisnnrof which the following is a specification.

The object of this invention isto provide a type of transmission in which the gear wheels are continuously in mesh, and a be produced by effecting engagement between one of the gears of a'given pair and the shaft to be driven, or directly between thel driving shaft and the driven shaft, without throwing out the main clutch.

A further object is to provide a transA mission mechanism in which the driving shaft carries a rigidly mounted gear wheel constantly imparting movement to a gear wheel keyed on a countershaft, the latter also having keyed thereon one gear wheel of each of the remaining pairs employed in the mechanism, and to provide in connection with the'foregoing a drivenshaft carrying loosely mounted gear wheels with means for locking any one of these gear wheels to the driven shaft.

A Still further object is to provide an interlocking device preventing the engagement of more than one pair of gear wheels at the same time.

A Still further object is to provide an interlocking device including a plurality of controlling rods, a lever mounted for universal movement, and a transversely slidable element carrying engaging devices for retaining either rod against movement While the other is being shifted.

With the foregoing and other objects in view, the invention consists in the novel construction and arrangement of elements described, illustrated and claimed, it being understood that modifications may be made Within the scope of the claim without departing from the spirit of the invention.`

In the drawings, Figures 1 is a view of the structure in elevation, the controlling elements being detached from the transmission case; Figure 2 is a longitudinal section through the transmission mechanism; Figure 3 is an end elevation .of the structure of Figure 1; Figure e is a plan view of the upper structure of Figure 3; Figure .portions of 1922.l serial No. 570,512.

5 -is a detail in'section showing the cooperation of the hand lever with the recessed the longitudinal rods 35, 36, of Figure 4t; Figure 6 shows holding elements engaging other recessed portions of these rods.

The casing of the transmission mechanism is. designated 5, the driving shaft shown at 10, the countershaft at 11 and the driven shaft at 12.

A gear wheel 14: is keyed on the shaft 10 and is retained against longitudinal movement by a set screw 14". rlhe gear 14 is normally loose with reference to the shaft 12, and this shaft also carries loosely mounted thereon gear wheels 15, 16and 17. Collars 18 and 19 serve an obvious purpose. rEhe gear wheels or the provided with clutchl or toothed surfaces 20, to-be engaged by the complementary clutch elements 21 and 22. last named have teeth on opposite sides thereof and are adapted to lock the adjacent gear wheels Vto the Shaft 12, it being understood that the devices 21 and 22 are splined to the shaft 12.

Countershaft 11 carries gear wheels 14', 15', 16 and 17 meshing with the oppositely` located gear wheels on the shafts and 11.V

The gear wheels 14:', 15', 16 and 17 are keyed to the shaft 11, and are driven through the gear Wheel 14 keyed to the driving shaft 10.

The gear Wheel 17 meshes with an idler 26, and the latter meshes with the gear Wheel 17, for producing reverse movement of the-driven shaft.

lt will be observed that all of the gear wheels are inconstant motion, and thus by the proper shift of the controlling mecha-` nism, the clutch elements 21 and 22 are thrown into position for effecting the required change of speed, one of the clutch elements being active at a time, to the exw olusion of the other. By throwing the clutch element 22 to the right, motion is imparteddirectly from the driving shaft 10 to the shaft 12. By throwing the clutch element 22 to the left, the gear wheel 15 is locked to the shaft 12 and movement is imparted thereto through the gear wheel shaft 11, gear wheel 14', gear wheel 14, the latter ,being keyed to the driving shaft. This provides for the intermediate speed.-

Low speed is provided through gear hubs thereof are j These devices Cil which is designed to prevent the sl'iilting et more than one geen' .vlieel at a time, it be; it, necessary,v to throw one set out of mesh before the gear wheels of another set are caused to mesh. The rods and are mounted for4 longitudinal movement in brackets, suoli as 37 and 3S; Each rod is provided with a cutaway portion 'or reeess, these recesses being designated 35 and 36 and facing' each other. Each rod is further provided with a recess 35 or 36, as the ease .tney be, and

these recesses last named are engaged by the inwardly exteneing lugs 33 and 39 'iounted on the slide which is movable transversely With reference to the rods 25 and 26. Trans verse rods or bers ll and l2 provide means for mounting" this slide, and the latter is provided with a slot Li3 engaged by the end ot' the lever 33, the lever passing through the opening orined by the oppositely located recesses 35 and 36.

Lever 33 is provided with a ball. member 33 operatingink a. socket 45 formedV in one element of the freine or bracket 46. This provides for substantially universal movement of the lever 33.

`When the lever is in neutral position the lugs 38 and 39 engage the Walls oit recesses :wir

therein.

35 and 36 and prevent the nlofement et' either red or 36 and therelfore prevent movement of the yokes and clutch members controlled bj-.f these rods. 'By impartinga sideivise movement to the lever 33, and then a inoven'ien't in direction at right angles to the movement irstnamed the lower end of the lever engages the Wall or' the slotted portion 43 oft the slide 40, and causes the slide to'inove laterally lfor the purpose of freeing' one of the rods 35 or 36 from the lug previously engaging the will 'of the recess The lever 33 also the wall o'l' the recess 35 or 33,as the case may be. and the movement of the lever in the required direction, impartsr longitudinal movement to the rods 35 or and to the yoles, and therefore to Athe elements.

vliet is claimed is:

ln a device ofthe class described, a pluralit` 'oi' reds for shitting clutch Vyoke's, said rods being provided `with recesses oppositely' located, a. lever ior universal movement about its pivotal point, one end of the lever engaging the Walls ot the recessed portions, s trai'isversely movable slide liavingi'h a slot. therein engaged by the end of the lever, said rods being provided withV additional reeessesoppositely located, :rnd lugs carried by said slide and cooperating 'With the .re`

c'esses last named, 'said lugs eztren'cling` to- Ward each other over the rods and spaced to permit partial engagement of both rods, and l'ree longitudinal movement of either rod upon transverse movement or' the slide by the lever. f Y

in testimony whereof if atlix my signature.

JULIAN E. MINN positively engages 

